Carbon dioxide recovery device

Abstract

The problem to be solved by the present invention is to provide a structure capable of continuously operating by suppressing variations in the thermal load of the entire device in a carbon dioxide recovery device that performs a desorption step and an adsorption step by means of thermal control of a heat pump type heat source device. In order to solve the problem, a heat exchange device (70) of a carbon dioxide recovery device (1) according to the present invention is provided with: a heat pump type heat source device (81); a heat source high-temperature water circuit (85) that includes a warm water tank (83) that stores warm water and circulates the warm water between the warm water tank (83) and the heat source device (81); a heat source low-temperature water circuit (86) that includes a cold water tank (82) that stores cold water and circulates the cold water between the cold water tank (82) and the heat source device (81); a warm water forward line (112a) for supplying warm water from the warm water tank (83) to the module (11); a warm water return line (112b) for returning the warm water heated by the module (11) to the warm water tank (83); a cold water forward line (111a) for supplying cold water from the cold water tank (82) to the module (11); and a cold water return line (111b) that returns the cooled cold water of the module (11) to the cold water tank (82).

Description

Technical Field

[0001] The invention relates to a carbon dioxide recovery device. Background Art

[0002] Conventionally, there is a known technique for using a heat source such as a heat pump in a system that uses a heat transfer medium to heat or cool target equipment. Patent Document 1, for example, describes this technique. Patent Document 1 relates to an energy-saving ventilation and air-conditioning system that maintains a conditioned space at a predetermined temperature and humidity.

[0003] [Prior Art Literature]

[0004] (Patent Document)

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2010-276217 Summary of the Invention

[0006] [Problems to be solved by the invention]

[0007] In addition, a heat source such as a heat pump is also used in the following carbon dioxide recovery device, which draws gases such as air containing carbon dioxide into a module that holds an adsorption material so that the gas is adsorbed on the adsorption material, and decompresses and heats the adsorption material to release the adsorbed carbon dioxide to recover the carbon dioxide.

[0008] Heat pumps like those described in Patent Document 1 take into account the impact of daytime electricity load peak-cutting, assuming that warm and cold heat are generated at night when electricity load is lower. If conventional heat pump-type heat sources were directly applied to a carbon dioxide recovery system that could potentially operate continuously day and night, the heat load would fluctuate significantly.

[0009] An object of the present invention is to provide a structure for suppressing fluctuations in the heat load of the entire device and enabling continuous operation in a carbon dioxide recovery device that performs a desorption process and an adsorption process by thermal control of a heat pump type heat source.

[0010] [Technical means to solve the problem]

[0011] (1) The present invention is a carbon dioxide recovery device (for example, the carbon dioxide recovery device 1 described later), comprising: a plurality of modules (for example, the module 11 described later), each having an adsorbent material (for example, the adsorbent material 12 described later) inside, performing an adsorption process and a desorption process, wherein the adsorption process is to draw gas containing carbon dioxide into the adsorbent material to adsorb the carbon dioxide, and the desorption process is to heat the surrounding area of ​​the adsorbent material under a reduced pressure state to desorb the carbon dioxide from the adsorbent material; a heat exchange device (for example, the heat exchange device 70 described later), capable of supplying heat to each of the modules. The heating of the heat transfer medium (for example, warm water described later) and the cooling of the heat transfer medium (for example, cold water described later); and the flow control unit (for example, the three-way valve 30a and the three-way valve 30a described later) can selectively supply the aforementioned heating heat transfer medium or the aforementioned cooling heat transfer medium to the aforementioned module; and the aforementioned heat exchange device has: a heat pump type heat source (for example, the heat source 81 described later) for heating the aforementioned heating heat transfer medium and cooling the aforementioned cooling heat transfer medium; a heat source high-temperature water circuit (for example, the heat source high-temperature water circuit 85 described later) including a heat source high-temperature water circuit for storing the heat transferred by the aforementioned heat source The heating heat transfer medium tank (for example, the warm water tank 83 described later) for storing the aforementioned heating heat transfer medium after being heated by the device is used to circulate the aforementioned heating heat transfer medium between the heating heat transfer medium tank and the aforementioned heat source; a heat source low-temperature water circuit (for example, the heat source low-temperature water circuit 86 described later) includes a cooling heat transfer medium tank (for example, the cold water tank 82 described later) for storing the aforementioned cooling heat transfer medium after being cooled by the aforementioned heat source, so that the aforementioned cooling heat transfer medium circulates between the cooling heat transfer medium tank and the aforementioned heat source; a heating heat transfer medium outgoing pipeline (for example, the warm water outgoing pipeline 112a described later) is connected from the aforementioned heating heat transfer medium to the cooling heat transfer medium tank. The heat medium box supplies the aforementioned heating heat transfer medium to the aforementioned module; the heating heat transfer medium return pipeline (for example, the warm water return pipeline 112b described later) returns the aforementioned heating heat transfer medium after being heated in the aforementioned module to the aforementioned heating heat transfer medium box; the cooling heat transfer medium outbound pipeline (for example, the cold water outbound pipeline 111a described later) supplies the aforementioned cooling heat transfer medium from the aforementioned cooling heat transfer medium box to the aforementioned module; and the cooling heat transfer medium return pipeline (for example, the cold water return pipeline 111b described later) returns the aforementioned cooling heat transfer medium after being cooled in the aforementioned module to the aforementioned cooling heat transfer medium box.

[0012] (2) In the carbon dioxide recovery device described in (1) above, optionally, the flow control unit is configured to control the flow of each of the modules, supplying the cooling heat transfer medium to the module performing the adsorption process, and supplying the heating heat transfer medium to the module performing the desorption process.

[0013] (3) In the carbon dioxide recovery device described in (2) above, the flow path control unit may be configured to adjust the flow rate of the cooling heat transfer medium or the heating heat transfer medium supplied to the module.

[0014] (4) In the carbon dioxide recovery device described in (3) above, the flow control unit can optionally perform control as follows: in the initial stage of temperature rise of the separation process, the flow rate of the heat transfer medium for heating is relatively increased; in the temperature maintaining stage after the initial stage of temperature rise, the flow rate of the heat transfer medium for heating is relatively reduced.

[0015] (5) In the carbon dioxide recovery device described in any one of (1) to (4) above, optionally, the heat source high-temperature water circuit comprises: a heat source outbound pipeline on the heating heat transfer medium side (for example, the warm water side heat source outbound pipeline 221 described later), which transports the heating heat transfer medium from the heating heat transfer medium box to the heat source device; and a heat source return pipeline on the heating heat transfer medium side (for example, the warm water side heat source return pipeline 222 described later), which returns the heating heat transfer medium from the heat source device to the heating heat transfer medium box; and the connection positions of the various pipelines of the heating heat transfer medium box are set in the order of, from top to bottom, the heat source return pipeline on the heating heat transfer medium side, the heat source outbound pipeline on the heating heat transfer medium side, and the heat transfer medium return pipeline.

[0016] (6) In the carbon dioxide recovery device described in any one of (1) to (4) above, the heat source low-temperature water circuit may optionally include: a heat source outbound pipeline on the cooling heat transfer medium side (for example, the cold water side heat source outbound pipeline 121 described later), which transports the cooling heat transfer medium from the cooling heat transfer medium box to the heat source; and a heat source return pipeline on the cooling heat transfer medium side (for example, the cold water side heat source return pipeline 122 described later), which returns the cooling heat transfer medium from the heat source to the cooling heat transfer medium box; and the connection positions of the pipelines of the cooling heat transfer medium box are set in the order of the cooling heat transfer medium return pipeline, the cooling heat transfer medium side heat source return pipeline, the cooling heat transfer medium outbound pipeline, and the cooling heat transfer medium side heat source outbound pipeline from top to bottom.

[0017] (Effects of the Invention)

[0018] According to the present invention, a structure can be provided for suppressing fluctuations in the heat load of the entire apparatus and enabling continuous operation in a carbon dioxide recovery apparatus that performs a desorption process and an adsorption process by heat control of a heat pump type heat source. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic diagram illustrating a structure related to gas flow in a carbon dioxide recovery device according to one embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram illustrating the structure of the carbon dioxide recovery device according to this embodiment related to the flow of liquid.

[0021] Figure 3 This is a schematic diagram illustrating the structure of the module of the carbon dioxide recovery device according to this embodiment, related to the flow of gas.

[0022] Figure 4 This is a schematic diagram illustrating the structure of the module of the carbon dioxide recovery device according to this embodiment, which is related to the flow of liquid.

[0023] Figure 5 This is a schematic diagram illustrating the structure of a heat source circuit of the carbon dioxide recovery device according to this embodiment.

[0024] Figure 6 This is a schematic diagram showing the connection locations of the various pipes connected to the warm water tank.

[0025] Figure 7 The diagram shows the connection locations of the various pipelines connected to the cold water tank.

[0026] Figure 8 This is a graph showing the temporal changes in the adsorption material temperature and the heat transfer medium flow rate during the desorption process.

[0027] Figure 9 This is a graph showing the temporal change in the heat exchange amount during the desorption process. DETAILED DESCRIPTION

[0028] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0029] Overall Structure

[0030] Figure 1 It is a schematic diagram showing the structure related to the flow of gas of a carbon dioxide recovery device 1 according to one embodiment of the present invention. Figure 2 Schematic diagram showing the structure of the carbon dioxide recovery device 1 of this embodiment related to the flow of liquid. Figure 1 The structure of the carbon dioxide recovery device 1 related to the flow of liquid is omitted in the figure. Figure 2 The structure of the carbon dioxide recovery device 1 related to the flow of gas is omitted in the figure.

[0031] The carbon dioxide recovery device 1 of this embodiment is used, for example, in direct air capture (DAC) technology, which recovers atmospheric carbon dioxide to reduce atmospheric carbon dioxide concentration. The carbon dioxide recovered by the carbon dioxide recovery device 1 is stored underground or reused as fuel or material.

[0032] like Figure 1 and Figure 2 As shown, the carbon dioxide recovery device 1 of this embodiment includes a module unit 10, a fan 61, a vacuum pump 62, a carbon dioxide recovery pump 63, an intercooler 64, a separator 65, a carbon dioxide tank 66, an inert gas tank 69, a heat exchange device 70 and a control device 90.

[0033] like Figure 1 As shown, the carbon dioxide recovery device 1 includes an adsorption line 101 , a vacuum line 102 , a carbon dioxide line 103 , a circulation line 104 , and an inert gas supply line 107 as gas flow paths.

[0034] The module unit 10 is formed by arranging a plurality of modules 11 for adsorbing carbon dioxide in parallel. In this embodiment, a total of 16 modules 11 are arranged by a pair of left and right module units 10.

[0035] Figure 3 This is a schematic diagram illustrating the gas flow structure of module 11 of the carbon dioxide recovery device 1 according to this embodiment. Module 11 is a carbon dioxide recovery module and includes an adsorbent 12, a first valve 21, a second valve 22, a third valve 23, a fourth valve 24, a pressure sensor 25, a carbon dioxide sensor 26, and a temperature sensor 27.

[0036] Adsorbent 12 is placed inside module 11 to adsorb carbon dioxide. Adsorbent 12 is a particulate component that adsorbs carbon dioxide at low temperatures (e.g., -30°C to 50°C) and releases it at high temperatures (e.g., 50°C to 110°C) when the ambient carbon dioxide concentration is low. Examples of this adsorbent 12 include solid amine carbon dioxide adsorbents composed of amines supported on a porous material such as silica.

[0037] The first valve 21 is an on-off valve located at the connection between the carbon dioxide line 103, which recovers carbon dioxide, and the module 11. A carbon dioxide recovery pump 63 is located on the carbon dioxide line 103. The second valve 22 is an on-off valve located at the connection between the vacuum line 102, which is equipped with the vacuum pump 62, and the module 11. The third valve 23 is an on-off valve located at the inlet for drawing air and other gases into the module 11. The fourth valve 24 is an on-off valve located at the connection between the adsorption line 101 and the module 11.

[0038] The first valve 21, the second valve 22, the third valve 23 and the fourth valve 24 are all opened and closed by the control device 90. The first valve 21, the second valve 22, the third valve 23 and the fourth valve 24 are, for example, normally open butterfly valves.

[0039] The pressure sensor 25 measures the internal pressure of the module 11. The carbon dioxide sensor 26 measures the carbon dioxide concentration inside the module 11. The temperature sensor 27 measures the temperature of the adsorbent 12. The measurement information of the pressure sensor 25, carbon dioxide sensor 26, and temperature sensor 27 is transmitted to the control device 90.

[0040] Back to Figure 1 Next, the adsorption line 101 and fan 61 will be described. The adsorption line 101 branches and connects to each module 11. The fan 61 is located at the junction of the branched sections of the adsorption line 101. When the fan 61 is driven, it creates a flow of gas from "intake" to "exhaust" into the module 11 via the adsorption line 101. This allows atmospheric air to be supplied to the module 11. A carbon dioxide concentration sensor 611, a humidity sensor 612, and a temperature sensor 613 are located in the exhaust section of the adsorption line 101 to measure the carbon dioxide, humidity, and temperature discharged from the adsorption line 101. The measurement information from the carbon dioxide concentration sensor 611, humidity sensor 612, and temperature sensor 613 is transmitted to the control device 90.

[0041] Vacuum lines 102 branch off and connect to each module 11. A vacuum pump 62 is located at the junction of the branched sections of the vacuum lines 102. By driving the vacuum pump 62, the gas inside the modules 11 is sucked through the vacuum lines 102, creating a vacuum state or a near-vacuum state inside the modules 11.

[0042] The carbon dioxide line 103 branches and is connected to each module 11. A carbon dioxide recovery pump 63, an intercooler 64, a separator 65, and a carbon dioxide tank 66 are arranged at a portion where the branched portions of the carbon dioxide line 103 converge.

[0043] The carbon dioxide recovery pump 63 provides a suction force to transport the carbon dioxide flowing through the carbon dioxide line 103 to the carbon dioxide tank 66. A check valve 631 is disposed upstream of the carbon dioxide recovery pump 63 in the carbon dioxide line 103. This prevents gas from flowing back from the intercooler 64 to the module 11.

[0044] The intercooler 64 is an intermediate cooler that cools the high-temperature gas containing carbon dioxide recovered from the module 11 to separate the gas from the liquid.

[0045] The water separated from the gas and liquid in the intercooler 64 is recovered by the separator 65. The separator 65 is provided with a first valve 651 and a second valve 652. The first valve 651 opens and closes the path communicating with the gas phase of the separator 65. The second valve 652 opens and closes the path communicating with the liquid phase of the separator 65.

[0046] The carbon dioxide tank 66 stores carbon dioxide recovered via the carbon dioxide line 103. A tank valve 661 is disposed upstream of the carbon dioxide tank 66 in the carbon dioxide line 103. The opening and closing of the tank valve 661 is controlled by the control device 90. Furthermore, various sensors, such as a pressure sensor 662, a flow rate sensor 663, a humidity sensor 664, a temperature sensor 665, and a carbon dioxide concentration sensor 666, are disposed between the tank valve 661 and the carbon dioxide tank 66 in the carbon dioxide line 103.

[0047] In addition to the carbon dioxide line 103, the carbon dioxide tank 66 is connected to a circulation line 104 that returns ballast to the carbon dioxide recovery pump 63. A flow rate sensor 667 is provided on the circulation line 104. Furthermore, the carbon dioxide tank 66 is provided with a pressure relief valve 668 that releases pressure when the pressure exceeds a predetermined value.

[0048] Next, the inert gas tank 69 will be described. The inert gas tank 69 stores N2, an inert gas, supplied from an N2 cylinder 691 at a predetermined pressure (e.g., 980 kPa). A cylinder valve 692 is located between the inert gas tank 69 and the N2 cylinder 691. Furthermore, the inert gas tank 69 is equipped with a pressure relief valve 693 that releases pressure when the pressure exceeds a predetermined level. A pressure sensor 694 is located within the inert gas tank 69. Pressure information measured by the pressure sensor 694 is transmitted to the control device 90.

[0049] The inert gas tank 69 is connected to the carbon dioxide line 103 via the inert gas supply line 107. An inert gas valve 695 is provided on the inert gas supply line 107. The inert gas valve 695 is controlled by the control device 90 to be opened and closed.

[0050] Reference Figure 2 The heat exchange device 70 is described below. The heat exchange device 70 supplies heat energy for heating the inside of each module 11 to a predetermined temperature when each module 11 of the module unit 10 performs the desorption process. The heat exchange device 70 also recovers heat energy that is not required when each module 11 performs the adsorption process.

[0051] The heat exchange device 70 of the present embodiment includes a heat source circuit 80 , a cold water line 111 , a hot water line 112 , a three-way valve 30 , a bypass path 31 , and a bypass valve 32 .

[0052] The heat source circuit 80 includes a heat source 81, a cold water tank 82, and a warm water tank 83 as its main components. Heat exchange is performed between the cooling heat transfer medium flowing through the cold water line 111 and the heating heat transfer medium flowing through the warm water line 112. Due to the heat transfer generated in the heat source circuit 80, the heat transfer medium flowing through the cold water line 111 is cooled, and the heat transfer medium flowing through the warm water line 112 is heated. The heat transfer medium is, for example, a liquid such as water. In addition, for the detailed structure of the heat source circuit 80, please refer to Figure 5 This is described below.

[0053] The chilled water line 111 is a pipe that circulates chilled water, serving as a cooling heat transfer medium. The chilled water line 111 branches to connect to the upstream and downstream sides of each module 11, connecting the chilled water tank 82 to each module 11. The line connected to the upstream side of each module 11 is designated as the outbound chilled water line 111a, while the line connected to the downstream side of each module 11 is designated as the return chilled water line 111b.

[0054] The outbound cold water line 111a is connected in parallel to multiple modules 11, and the cold water supply can also be carried out in parallel according to the modules 11. A first cold water circulating water pump 822 and a second cold water circulating water pump 823 are arranged on the outbound cold water line 111a. The first cold water circulating water pump 822 and the second cold water circulating water pump 823 are, for example, cascade pumps.

[0055] Furthermore, a circulation line 824 is located on the outbound chilled water line 111a, returning from the downstream side of the second chilled water circulating pump 823 to the upstream side. A safety valve 825 is located on this circulation line 824. When the pressure in the system between the second chilled water circulating pump 823 and the chilled water line 111 exceeds a predetermined pressure, the safety valve 825 releases pressure, suppressing any pressure increase. By arranging the safety valve 825, which releases pressure in the event of an abnormal pressure in the chilled water line 111, in parallel with the second chilled water circulating pump 823, both high-flow circulation and safe operation can be achieved through the second chilled water circulating pump 823.

[0056] The cold water return pipeline 111 b is also connected in parallel to the multiple modules 11 , and the recovery of the cold water after cooling is completed can also be carried out in parallel according to the modules 11 .

[0057] The hot water line 112 is a pipe that circulates hot water, serving as a heat transfer medium for heating. The hot water line 112 branches off and connects to the upstream and downstream sides of each module 11, connecting the hot water tank 83 to each module 11. The line connected to the upstream side of each module 11 within the hot water line 112 is designated as the outbound hot water line 112a, while the line connected to the downstream side of each module 11 is designated as the return hot water line 112b.

[0058] The outbound warm water pipeline 112a is connected in parallel to multiple modules 11, and the warm water supply can also be carried out in parallel according to the modules 11. A first warm water circulating water pump 832 and a second warm water circulating water pump 833 are arranged on the outbound warm water pipeline 112a. For example, cascade pumps are used for the first and second warm water circulating water pumps 832, 833. By using cascade pumps that generate a large amount of heat, the heat transfer medium passing through the first and second warm water circulating water pumps 832, 833 can be further heated.

[0059] Furthermore, a circulation line 834 is located on the outbound hot water line 112a, returning from the downstream side of the second hot water circulating pump 833 to the upstream side. A safety valve 835 is located on this circulation line 834. When the pressure in the system between the second hot water circulating pump 833 and the hot water line 112 exceeds a predetermined pressure, the safety valve 835 releases pressure, suppressing any pressure increase. By arranging the safety valve 835, which releases pressure in the hot water line 112 system when pressure is abnormal, in parallel with the second hot water circulating pump 833, both high-flow circulation and safe operation can be achieved through the second hot water circulating pump 833.

[0060] The warm water return pipeline 112 b is also connected in parallel to the multiple modules 11 , and the recovery of the warm water after heating can also be carried out in parallel according to the modules 11 .

[0061] The three-way valve 30 is connected to the cold water line 111, the hot water line 112, and the module 11. The three-way valve 30 is disposed on the upstream and downstream sides of the module 11. The three-way valve 30 is configured to switch between the following modes: a cold water connection state in which the cold water line 111 is connected to the module 11; a hot water connection state in which the hot water line 112 is connected to the module 11; and a blocked state in which the cold water line 111 and the hot water line 112 are blocked from the module 11.

[0062] The flow path switching of the three-way valve 30 is controlled by the control device 90. In the module 11, the heat medium is introduced through the three-way valve 30 arranged on the upstream side, and the heat medium is returned to the heat source 81 side through the three-way valve 30 arranged on the downstream side.

[0063] The bypass path 31 is a flow path that allows the heat transfer medium to flow between modules 11. The bypass path 31 connects two modules 11. The modules 11 connected by the bypass path 31 may be adjacent modules or modules 11 that are not adjacent but located at a distance.

[0064] The bypass valve 32 is arranged in the bypass path 31. The bypass valve 32 is arranged in each of the plurality of bypass paths 31. The bypass valve 32 is controlled to be opened and closed by the control device 90.

[0065] Figure 4 Schematic diagram illustrating the structure of the module 11 of the carbon dioxide recovery device 1 according to this embodiment related to the flow of liquid. In the following description, the three-way valve 30 disposed on the upstream side of the module 11 is referred to as the three-way valve 30a, and the three-way valve 30 disposed on the downstream side of the module 11 is referred to as the three-way valve 30b.

[0066] like Figure 4 As shown, the module 11 includes an inlet flow path 33 connected to an inlet for the heat transfer medium to flow in, and an outlet flow path 34 connected to an outlet for the heat transfer medium to flow out. The bypass path 31 is connected to the outlet flow path 34 of the module 11 and is also connected to the inlet flow path 33 of another module 11.

[0067] A three-way valve 30a is located at the upstream end of the inlet-side flow path 33, and a three-way valve 30b is located at the downstream end of the outlet-side flow path 34. When hot water is connected, the three-way valve 30a is connected to the hot water outbound line 112a, and the three-way valve 30b is connected to the hot water return line 112b. When cold water is connected, the three-way valve 30a is connected to the cold water outbound line 111a, and the three-way valve 30b is connected to the cold water return line 111b.

[0068] The three-way valve 30a and the three-way valve 30b are configured to be flow rate adjustable. By means of this flow rate adjustment function, the flow rate of hot water can be adjusted when hot water is connected, and the flow rate of cold water can be adjusted when cold water is connected.

[0069] A temperature sensor 35 is disposed in the inlet-side flow path 33. A temperature sensor 36 and a flow rate sensor 37 are disposed in the outlet-side flow path 34. Measurement information from the temperature sensor 35, the temperature sensor 36, and the flow rate sensor 37 is transmitted to the control device 90.

[0070] Next, the control device 90 will be described. The control device 90 controls the operation of various components of the carbon dioxide recovery apparatus 1. The control device 90 controls the driving and stopping of devices used for carbon dioxide adsorption and desorption. To enable multiple modules 11 to repeatedly perform adsorption and desorption in a timed sequence, the control device 90 selectively controls the timing of supplying the heat transfer medium to each module 11 for heating and cooling.

[0071] The control device 90 controls the opening and closing of the first valve 21, the second valve 22, the third valve 23, and the fourth valve 24 included in each module 11, and controls the opening and closing of each bypass valve 32. In addition, the control device 90 controls the driving of the fan 61, the vacuum pump 62, the carbon dioxide recovery pump 63, the first cold water circulation pump 822, the second cold water circulation pump 823, the first warm water circulation pump 832, the second warm water circulation pump 833, and the like, and controls the opening and closing of the safety valves 825 and 835.

[0072] The control device 90 is a computer having, for example, a central processing unit (CPU), read-only memory (ROM), and random access memory (RAM). The control device 90 may be composed of a single unit or multiple units. Furthermore, the control device 90 may be constructed using circuits such as relays.

[0073] <Carbon dioxide recovery>

[0074] Next, the control for recovering carbon dioxide performed by the control device 90 will be described. The carbon dioxide recovery device 1 alternately performs an adsorption process in which carbon dioxide in gases such as the atmosphere is adsorbed onto the adsorbent 12 within the module 11, and a desorption process in which the carbon dioxide adsorbed onto the adsorbent 12 is desorbed, and the desorbed carbon dioxide is stored in the carbon dioxide tank 66, thereby removing and recovering carbon dioxide from the air.

[0075] The adsorption process adsorbs carbon dioxide onto the adsorbent 12 within the module 11. During the adsorption process, the third valve 23 and fourth valve 24 of the module 11 are open, while the first valve 21 and second valve 22 are closed. Through valve opening and closing control and the heat exchange device 70, the three-way valves 30a and 30b are controlled to connect to the cold water supply. Cold water flows through the module 11, cooling the adsorbent 12 within the module 11. The fan 61 is driven to generate a gas flow from upstream to downstream, drawing in gas containing carbon dioxide (e.g., atmospheric air) through the third valve 23. This drawn-in gas passes through the adsorbent 12 within the module 11. At this point, the interior of the module 11 reaches room temperature (25°C) due to the cooling effect of the cold water, and the carbon dioxide in the gas is adsorbed onto the adsorbent 12. Gases other than carbon dioxide, such as nitrogen and oxygen, pass through the fourth valve 24 and the adsorption line 101 and are discharged to the exterior of the carbon dioxide recovery device 1.

[0076] The desorption process desorbs carbon dioxide from the adsorbent 12 within the module 11. During this process, the first, third, and fourth valves 21, 23, and 24 of the module 11 are closed, and the second valve 22 is opened. The vacuum pump 62 operates to draw air from the interior of the module 11, reducing the pressure and bringing it to a vacuum or near-vacuum state. Through valve opening and closing control and the heat exchange device 70, the three-way valves 30a and 30b are controlled to connect to the warm water supply. Warm water flows through the module 11, providing heat energy and raising the temperature of the adsorbent 12 within the module 11. This temperature control heats the adsorbent 12 to a predetermined temperature (e.g., 80°C) sufficient for the desorption process, allowing the carbon dioxide adsorbed on the adsorbent 12 to be desorbed. Next, the second, third, and fourth valves 22, 23, and 24 are closed, the first valve 21 is opened, and the carbon dioxide recovery pump 63 is activated. The desorbed carbon dioxide is stored in the carbon dioxide tank 66 via the carbon dioxide pipeline 103. In this embodiment, each process is controlled such that 12 of the 16 modules 11 perform the adsorption process and the remaining 4 perform the desorption process.

[0077] <Heat source circuit>

[0078] Next, refer to Figure 5 The detailed structure of the heat source circuit 80 will be described. Figure 5 Schematic diagram showing the structure of the heat source circuit 80 of the carbon dioxide recovery device 1 according to this embodiment.

[0079] like Figure 5 As shown, the heat source circuit 80 of this embodiment includes a heat source device 81 , a heat source high-temperature water circuit 85 including a hot water tank 83 , a heat source low-temperature water circuit 86 including a cold water tank 82 , and a liquid storage tank 88 .

[0080] The heat source 81 cools the heat medium introduced from the cold water tank 82 and heats the medium introduced from the warm water tank 83. The heat source 81 is composed of a heat pump that transfers heat by utilizing the compression and expansion of gas.

[0081] The heat source high temperature water circuit 85 circulates hot water between the hot water tank 83 and the heat source 81. The heat source high temperature water circuit 85 includes the hot water tank 83, a hot water side heat source outbound line 221, and a hot water side heat source return line 222.

[0082] The warm water tank 83 is a heat storage device with thermal insulation capabilities that can store heat transfer medium. The capacity of the warm water tank 83 is preferably set to at least five times the maximum flow rate of the warm water circulating water pump 831, described later. By setting the capacity of the warm water tank 83 large relative to the flow rate of the heat transfer medium, fluctuations in the temperature of the warm water (heat transfer medium) during thermal load fluctuations can be suppressed to within a specified temperature range (e.g., within ±5°C). In other words, the warm water tank 83 acts as a buffer against thermal load fluctuations.

[0083] A temperature sensor 830 for measuring the temperature of the heat transfer medium is located inside the warm water tank 83. The measurement results of the temperature sensor 830 are output to the control device 90. The warm water tank 83 is connected to the heat source 81 via a warm water side heat source outbound line 221 and a warm water side heat source return line 222.

[0084] The hot water side heat source outbound pipeline 221 is the path for the heat transfer medium to flow from the hot water tank 83 to the heat source device 81. On the hot water side heat source outbound pipeline 221, a valve 301, a hot water side circulating water pump 831, a flow sensor 231, and a temperature sensor 232 are arranged in sequence from the upstream side. The hot water side circulating water pump 831 is composed of, for example, a centrifugal pump, etc., which circulates the heat transfer medium between the hot water tank 83 and the heat source device 81. The flow sensor 231 measures the flow rate of the heat transfer medium flowing into the heat source device 81 and outputs the measurement result to the control device 90. The temperature sensor 233 measures the temperature of the heat transfer medium flowing into the heat source device 81 and outputs the measurement result to the control device 90.

[0085] The warm water side heat source return line 222 is the path for the heat transfer medium to flow from the heat source 81 to the warm water tank 83. A temperature sensor 233 and a valve 302 are located on the warm water side heat source return line 222, sequentially from the upstream side. The temperature sensor 233 measures the temperature of the warm water flowing out of the heat source 81 and outputs the measurement result to the control device 90.

[0086] A hot water outflow line 112a and a hot water return line 112b are connected to the hot water tank 83. Valve 305, water filter 234, and valve 306 are located near the hot water tank 83 on the hot water outflow line 112a. Valves 303 and 304 are located on the hot water return line 112b.

[0087] The connection positions (port positions) of the respective pipelines of the warm water tank 83 are preferably set in consideration of the temperature stratification of the heat transfer medium (warm water) stored in the warm water tank 83 . Figure 6 It is a schematic diagram showing the connection positions of the various pipelines connected to the warm water tank 83.

[0088] like Figure 6 As shown, the warm water stored in the warm water tank 83 forms temperature stratification, with temperatures increasing toward the upper layer and decreasing toward the lower layer. The connection positions of the various pipelines in the warm water tank 83 are set, from highest to lowest, to the warm water side heat source return pipeline 222, the warm water outbound pipeline 112a, the warm water side heat source outbound pipeline 221, and the warm water return pipeline 112b.

[0089] The hot water return line 222 is a pipe that returns the warm water (e.g., 82°C) heated by the heat source 81 to the highest temperature portion of the temperature stratification. The hot water outflow line 112a is connected to the second-highest point after the hot water return line 222. This allows the hot water heated by the heat source 81 to be delivered to the upstream side of the module 11 at a maintained high temperature (e.g., 80°C) without significantly lowering its temperature.

[0090] The hot water-side heat source outbound line 221 is a pipe used to deliver the heated water to the heat source 81. It is connected to the next highest point after the connection point of the hot water outbound line 112a. This allows high-temperature hot water to be delivered via the hot water outbound line 112a while maintaining a relatively high temperature (e.g., 75°C) to the heat source 81 via the hot water-side heat source outbound line 221. The hot water return line 112b is a pipe for returning hot water at a relatively low temperature (e.g., 72°C) after heating the module 11. Connecting the hot water return line 112b to the lowest point minimizes the amount of cold water that mixes with the hot water outbound line 112a, which requires a higher temperature.

[0091] Next, return to Figure 5 The heat source low temperature water circuit 86 is described. The heat source low temperature water circuit 86 circulates cold water between the cold water tank 82 and the heat source 81. The heat source low temperature water circuit 86 includes the cold water tank 82, a cold water side heat source outbound pipeline 121, and a cold water side heat source return pipeline 122.

[0092] The cold water tank 82 is a heat storage device with thermal insulation capabilities that can store heat transfer medium. The capacity of the cold water tank 82 is preferably set to at least five times the maximum flow rate of the cold water circulating water pump 821, described later. By setting the capacity of the cold water tank 82 larger than the flow rate of the heat transfer medium, fluctuations in the temperature of the cold water (heat transfer medium) during thermal load fluctuations can be suppressed to within a specified temperature range (e.g., within ±5°C). In other words, the cold water tank 82 acts as a buffer against thermal load fluctuations.

[0093] A temperature sensor 820 for measuring the temperature of the heat transfer medium is located inside the cold water tank 82. The measurement results of the temperature sensor 820 are output to the control device 90. The cold water tank 82 is connected to the heat source 81 via a cold water side heat source outbound pipeline 121 and a cold water side heat source return pipeline 122.

[0094] The cold water side heat source outbound pipeline 121 is the path for the heat transfer medium to flow from the cold water tank 82 to the heat source 81. The cold water side heat source outbound pipeline 121 is equipped with a valve 307, a cold water side circulating water pump 821, a flow sensor 131, and a temperature sensor 132. The cold water side circulating water pump 821 is composed of, for example, a centrifugal pump, and circulates the heat transfer medium between the cold water tank 82 and the heat source 81. The flow sensor 131 measures the flow rate of the heat transfer medium flowing into the heat source 81 and outputs the measurement result to the control device 90. The temperature sensor 132 measures the temperature of the heat transfer medium flowing into the heat source 81 and outputs the measurement result to the control device 90.

[0095] Furthermore, a radiator bypass line 123 for cooling the heat medium and a heater bypass line 124 for heating the heat medium are connected to the cold water-side heat source outbound line 121. Radiator bypass line 123 and heater bypass line 124 form a temperature adjustment circuit that adjusts the temperature of the heat medium flowing into heat source 81 to a temperature suitable for operation when the outside air temperature or heat load fluctuates.

[0096] The radiator bypass line 123 is connected between the cold water side circulating water pump 821 and the flow sensor 131 in the cold water side heat source outbound line 121. A valve 141 and a radiator fan 142 are arranged on the radiator bypass line 123. The valve 141 can open and close the flow path and adjust the flow rate by means of a control signal from the control device 90. The radiator fan 142 is a heat dissipation device that cools the heat transfer medium passing through the radiator bypass line 123. The cooling of the heat transfer medium by the radiator bypass line 123 is mainly carried out in high temperature conditions such as summer. By cooling the heat transfer medium by the radiator bypass line 123, the temperature of the cold water introduced into the heat source 81 is controlled to be below a preset threshold value.

[0097] The heater bypass line 124 is connected between the cold water side circulating water pump 821 and the flow sensor 131 in the cold water side heat source outbound line 121, and to the inner side of the radiator bypass line 123. A valve 308 and a heater 150 are arranged on the heater bypass line 124. The heater 150 is driven by a control signal from the control device 90 and a drive signal from the relay to heat the heat transfer medium flowing through the heater bypass line 124. The heating of the heat transfer medium by the heater bypass line 124 is mainly carried out at low temperatures, such as when starting in winter. By heating the heat transfer medium by the heater bypass line 124, the temperature of the heat transfer medium introduced into the heat source 81 is controlled to be above a preset threshold value.

[0098] The cold water-side heat source return line 122 is the path for the heat transfer medium to flow from the heat source 81 to the cold water tank 82. Disposed on this cold water-side heat source return line 122, from the upstream side, are a temperature sensor 133, valve 309, valve 310, valve 311, and valve 312. The temperature sensor 132 measures the temperature of the cold water flowing out of the heat source 81 and outputs the measurement result to the control device 90.

[0099] A cold water outflow line 111a and a cold water return line 111b are connected to the cold water tank 82. Valve 315, a water filter 134, and valve 316 are located near the cold water tank 82 on the cold water outflow line 111a. Valves 313 and 314 are located on the cold water return line 111b.

[0100] The connection positions (port positions) of the respective pipelines of the cold water tank 82 are preferably set in consideration of the temperature stratification of the heat transfer medium (cold water) stored in the cold water tank 82 . Figure 7 Schematic diagram showing the connection positions of various pipelines connected to the cold water tank 82.

[0101] like Figure 7 As shown, the cold water stored in the cold water tank 82 forms temperature stratification, with temperatures increasing toward the upper layers and decreasing toward the lower layers. The connection positions of the various pipelines in the cold water tank 82 are set, from highest to lowest, as follows: the cold water return line 111b, the cold water side heat source return line 122, the cold water outbound line 111a, and the cold water side heat source outbound line 121.

[0102] The chilled water return line 111b is a pipe for returning chilled water at a relatively high temperature (e.g., 36°C) after cooling the module 11. Connecting the chilled water return line 111b to the highest position prevents mixing of high-temperature chilled water with the chilled water delivered from the chilled water outflow line 111a. The chilled water heat source return line 122 is a pipe for returning chilled water (e.g., 30°C) cooled by the heat source 81. It is connected to the next highest point after the chilled water return line 111b. The chilled water returned via the chilled water heat source return line 122 moves to the lower temperature stratification level.

[0103] The outbound chilled water line 111a is connected to the second-highest position relative to the connection point of the outbound chilled water line 122. This allows the chilled water cooled by the heat source 81 to be delivered to the upstream side of the module 11 at a low temperature (e.g., 31°C) without significantly increasing its temperature. The outbound chilled water line 121 is connected to the lowest position and delivers the low-temperature (e.g., 33°C) chilled water that has not been delivered to the module 11 from the outbound chilled water line 111a to the heat source 81.

[0104] Next, return to Figure 5 , the equipment heat recovery circuit 87 is explained. The equipment heat recovery circuit 87 cools the target equipment such as the intermediate cooler 64, the vacuum pump 62 and the carbon dioxide recovery pump 63 included in the heat source low-temperature water circuit 86, and increases the temperature of the heat transfer medium.

[0105] The equipment heat recovery circuit 87 is connected in parallel with the heat source low-temperature water circuit 86. The equipment heat recovery circuit 87 of this embodiment includes a first equipment heat cooling line 126 for exchanging heat with the intercooler 64, and a second equipment heat cooling line 127 for exchanging heat with the vacuum pump 62 and the carbon dioxide recovery pump 63.

[0106] The upstream end of the first equipment thermal cooling pipeline 126 is connected to the cold water side heat source return pipeline 122, and the downstream end is connected to the cold water side heat source outbound pipeline 121. In this embodiment, the upstream end of the first equipment thermal cooling pipeline 126 is connected between valves 309 and 310 in the cold water side heat source return pipeline 122. The downstream end of the first equipment thermal cooling pipeline 126 is connected between valve 307 in the cold water side heat source outbound pipeline 121 and the cold water side circulating water pump 821.

[0107] The first equipment heat cooling line 126 is connected to the intercooler 64, which generates the heat of condensation. The intercooler 64 is cooled by cold water, recovering the heat of condensation. The cold water, heated by heat exchange with the intercooler 64, is then transported to the cold water-side heat source outbound line 121.

[0108] A flow sensor 841 and a temperature sensor 842 are disposed upstream of the intercooler 64 in the first equipment hot cooling line 126, and a temperature sensor 843 and a valve 317 are disposed downstream of the intercooler 64. The flow sensor 841 measures the flow rate of the heat transfer medium before heat exchange with the intercooler 64 and outputs the measurement result to the control device 90. The temperature sensor 842 measures the temperature of the heat transfer medium before heat exchange with the intercooler 64 and outputs the measurement result to the control device 90. The temperature sensor 843 measures the temperature of the heat transfer medium after heat exchange with the intercooler 64 and outputs the measurement result to the control device 90.

[0109] The upstream end of the second equipment thermal cooling pipeline 127 is connected to the cold water side heat source return pipeline 122, and the downstream end is connected to the cold water side heat source outbound pipeline 121. In this embodiment, the upstream end of the second equipment thermal cooling pipeline 127 is connected between valves 310 and 311 in the cold water side heat source return pipeline 122. The downstream end of the second equipment thermal cooling pipeline 127 is connected between valve 307 in the cold water side heat source outbound pipeline 121 and the cold water side circulating water pump 821, and is further upstream than the downstream end of the first equipment thermal cooling pipeline 126.

[0110] Furthermore, the second equipment heat cooling line 127 of the present embodiment includes a first branch line 127 a for cooling the vacuum pump 62 and a second branch line 127 b for cooling the carbon dioxide recovery pump 63 .

[0111] The first branch line 127a is connected to the vacuum pump 62 and cools the vacuum pump 62 with cold water. The heat transfer medium, heated by heat exchange with the vacuum pump 62, merges with the second branch line 127b and is transported to the cold water side heat source outbound line 121.

[0112] A flow sensor 851 and a temperature sensor 852 are located upstream of the vacuum pump 62 in the first branch line 127a, and a temperature sensor 853 is located downstream of the vacuum pump 62. The flow sensor 851 measures the flow rate of the heat transfer medium before heat exchange with the vacuum pump 62 and outputs the measurement result to the control device 90. The temperature sensor 852 measures the temperature of the heat transfer medium before heat exchange with the vacuum pump 62 and outputs the measurement result to the control device 90. The temperature sensor 853 measures the temperature of the cold water after heat exchange with the vacuum pump 62 and outputs the measurement result to the control device 90.

[0113] The second branch line 127b is connected to the carbon dioxide recovery pump 63 and uses a heat transfer medium to cool the carbon dioxide recovery pump 63. The heat transfer medium, heated by heat exchange with the carbon dioxide recovery pump 63, merges with the first branch line 127a and is transported to the cold water-side heat source outbound line 121.

[0114] A flow sensor 861 and a temperature sensor 862 are located upstream of the carbon dioxide recovery pump 63 in the second branch line 127b, and a temperature sensor 863 is located downstream of the carbon dioxide recovery pump 63. The flow sensor 861 measures the flow rate of the heat transfer medium before heat exchange with the carbon dioxide recovery pump 63 and outputs the measurement result to the control device 90. The temperature sensor 862 measures the temperature of the heat transfer medium before heat exchange with the carbon dioxide recovery pump 63 and outputs the measurement result to the control device 90. The temperature sensor 863 measures the temperature of the heat transfer medium after heat exchange with the carbon dioxide recovery pump 63 and outputs the measurement result to the control device 90.

[0115] A facility cooling pump 870 is disposed upstream of the branch point between first branch line 127a and second branch line 127b in second facility heat-cooling line 127. Furthermore, valves 318 and 319 are disposed downstream of the confluence of first branch line 127a and second branch line 127b in second facility heat-cooling line 127.

[0116] In this embodiment, the equipment cooling pump 870 is comprised of a cascade pump having sufficient head to pump the heat transfer medium without being hampered by the high pressure losses in the equipment undergoing heat recovery, namely the vacuum pump 62 and the carbon dioxide recovery pump 63. Heat generated by operating the equipment cooling pump 870 is also recovered as exhaust heat using cooling water.

[0117] As described above, the equipment heat recovery circuit 87 can recover the water vapor condensation heat of the intercooler 64 and the exhaust heat of the vacuum pump 62 and the carbon dioxide recovery pump 63 in the heat transfer medium to cool the target equipment, and through heat recovery, the heat transfer medium is made to flow into the heat source 81 with high temperature potential energy.

[0118] The equipment heat recovery circuit 87 uses the low-temperature heat transfer medium cooled by the heat source 81 to cool the target equipment, namely the vacuum pump 62, the carbon dioxide recovery pump 63, and the intercooler 64. The chilled water, after recovering the exhaust heat from cooling the target equipment (the vacuum pump 62, the carbon dioxide recovery pump 63, and the intercooler 64), joins the cold water-side heat source outbound line 121, which carries the chilled water discharged from the cold water tank 82 (e.g., the hotter area in the upper layer of the cold water tank 82), and is then directed to the heat source 81. The chilled water, after the exhaust heat is recovered, is heated to a suitable temperature range.

[0119] In this embodiment, the radiator bypass line 123 for cooling the cold water or the heater bypass line 124 for heating the cold water is used to adjust the temperature to a more appropriate range before entering the heat source 81. Therefore, even in operation with large fluctuations in heat load, the heat fluctuations in the time series can be smoothed and the inflow temperature to the heat source 81 can be fixed.

[0120] Next, the structure of the liquid storage tank 88 will be described. The liquid storage tank 88 is a tank that can store heat transfer medium. The liquid storage tank 88 is connected to the warm water tank 83 and to the cold water tank 82. A valve 320 is arranged between the liquid storage tank 88 and the warm water tank 83, and a valve 321 is arranged between the liquid storage tank 88 and the cold water tank 82. When it is necessary to adjust the storage amount of the heat transfer medium stored in the warm water tank 83, the valve 320 is opened to transfer the heat transfer medium between the liquid storage tank 88 and the warm water tank 83. Similarly, when it is necessary to adjust the storage amount of the heat transfer medium stored in the cold water tank 82, the valve 321 is opened to transfer the heat transfer medium between the liquid storage tank 88 and the cold water tank 82. A liquid level sensor 880 for monitoring the storage amount is arranged inside the liquid storage tank 88. The measurement results of the liquid level sensor 880 are output to the control device 90. The control device 90 uses the measurement result of the liquid level sensor 880 to determine whether the liquid tank 88 can be used, etc.

[0121] Flow Control

[0122] Next, refer to Figure 8 and Figure 9 , the flow rate control performed by the control device 90 is explained. Figure 8 This graph shows the temporal changes in the adsorption material temperature and the heat transfer medium flow rate (warm water flow rate) during the desorption process. Figure 9 This is a graph showing the temporal change in the heat exchange amount during the desorption process.

[0123] like Figure 8As shown, the control device 90 controls the openings of the three-way valves 30a and 30b to be wide open in the early stages of the desorption process, which involves a high heat load, to increase the flow rate. This allows the temperature of the adsorbent 12 to be raised quickly, promoting desorption. For example, during the initial temperature rise phase of the desorption process, the control device 90 controls the openings of the three-way valves 30a and 30b to achieve a maximum flow rate of approximately 30 L / min.

[0124] After the middle stage of the desorption process, since the heat treatment load decreases, the openings of the three-way valves 30a and 30b are controlled to be small so that the flow rate becomes relatively small. For example, during the temperature maintenance stage after the middle stage of the desorption process, the control device 90 controls the openings of the three-way valves 30a and 30b so that the flow rate is limited to about 10 L / min, so that the temperature difference between the inlet temperature and the outlet temperature of the warm water is about 3°C. Figure 9 As shown, the amount of heat exchange after the middle stage of the separation process can be reduced, and the energy loss as a whole can be reduced.

[0125] The timing for changing the flow rate at the initial stage and the middle stage of the separation process can be determined based on the inlet temperature of the warm water detected by the temperature sensor 35, the outlet temperature of the warm water detected by the temperature sensor 36, and the adsorption material temperature of the adsorption material 12 detected by the temperature sensor 27. For example, the control device 90 uses the temperature difference between the inlet temperature and the outlet temperature of the warm water, the warm water, the outlet temperature threshold, and the elapsed time to adjust the flow rate using the three-way valve 30a and the three-way valve 30b.

[0126] In the present embodiment, the valves 301 to 321 are automatically controlled by the control device 90 . However, when automatic control is not performed, manual valves may be used.

[0127] As described above, the carbon dioxide recovery device 1 of this embodiment comprises: a plurality of modules 11, each having an adsorbent material 12 inside, performing an adsorption process and a desorption process, wherein the adsorption process is to suck a gas containing carbon dioxide into the adsorbent material 12 to adsorb carbon dioxide, and the desorption process is to desorb carbon dioxide from the adsorbent material 12 by heating the area around the adsorbent material 12 under a reduced pressure state; a heat exchange device 70, capable of supplying warm water (heat transfer medium for heating) to each of the modules 11 for heating, and supplying a heat transfer medium for cooling for cooling; and a three-way valve (flow control unit) 30, capable of selectively supplying warm water or cold water to the module 11; and the heat exchange device 70 comprises: a heat pump type heat source 81, which heats the warm water, and The cold water is cooled; the heat source high-temperature water circuit 85 includes a warm water tank (heat transfer medium tank for heating) 83 for storing warm water heated by the heat source 81, so that the warm water circulates between the warm water tank 83 and the heat source 81; the heat source low-temperature water circuit 86 includes a cold water tank (cooling heat transfer medium tank) 82 for storing cold water cooled by the heat source 81, so that the cold water circulates between the cold water tank 82 and the heat source 81; a warm water outbound pipeline 112a supplies warm water from the warm water tank 83 to the module 11; a warm water return pipeline 112b returns the heated warm water of the module 11 to the warm water tank 83; a cold water outbound pipeline 111a supplies cold water from the cold water tank 82 to the module 11; and a cold water return pipeline 111b returns the cooled cold water of the module 11 to the cold water tank 82.

[0128] As a result, the timing of the adsorption process and the separation process can be staggered in multiple modules 11, so that the temporary concentration of the processing load can be avoided. In addition, the warm water tank 83 and the cold water tank 82 act as a buffer zone for thermal fluctuations, so the deterioration of temperature tracking caused by the change in the required amount of heat can be avoided, and the equipment efficiency can be improved to suppress power consumption. Since the heating amount of the heat source 81 and the heat exhaust recovered from the module 11 or the target equipment can also be fixed, unlike the existing technology where the heat load varies significantly during the day and night, a continuous warm heat supply can be stably achieved. Furthermore, since the heat source 81 is always heating the warm water tank 83 and the heat source 81 is always cooling the cold water tank 82, the warm water or cold water will not deviate from the required temperature range over time, so that the temperature range can be maintained within a certain range.

[0129] The three-way valves 30 a and 30 b of this embodiment are configured to control the flow path of each module 11 , supplying cold water to the module 11 performing the adsorption process and supplying warm water to the module 11 performing the desorption process.

[0130] In this way, the three-way valve 30a located on the upstream side of each module 11 and the three-way valve 30b located on the downstream side can be controlled in a manner synchronized with the operating status of each of the multiple modules 11, thereby minimizing the mixing of warm water and cold water and reducing the loss of heat energy.

[0131] In addition, the three-way valve 30 a and the three-way valve 30 b of the present embodiment are configured to be able to adjust the flow rate of cold water or hot water supplied to the module 11 .

[0132] As a result, the flow rate of the heat transfer medium can be controlled according to the required temperature range and operating conditions, so more precise control can be performed according to the actual conditions, which can further improve energy efficiency.

[0133] The three-way valves 30a and 30b of this embodiment are controlled as follows: the flow rate of the warm water is relatively increased in the initial temperature rise stage of the desorption process, and the flow rate of the warm water is relatively reduced in the temperature holding stage after the initial temperature rise stage.

[0134] Thus, during the temperature rise phase, which requires a large amount of heat, the temperature of the adsorbent material 12 can be quickly raised to the desired temperature using the required heat. After the initial temperature rise phase, the supply of hot water can be adjusted to a sufficient level to maintain the temperature. Since excessive heat energy is not supplied during the temperature maintenance phase, the overall heat energy loss in the desorption process can be reduced, achieving more efficient operation.

[0135] In addition, the heat source high-temperature water circuit 85 of this embodiment has: a warm water side heat source outbound pipeline 221, which transports warm water from the warm water tank 83 to the heat source device 81; and a warm water side heat source return pipeline 222, which returns warm water from the heat source device 81 to the warm water tank 83; the connection positions of the various pipelines of the warm water tank 83 are set to be, from top to bottom, the warm water side heat source return pipeline 222, the warm water outbound pipeline 112a, the warm water side heat source outbound pipeline 221, and the warm water return pipeline 112b.

[0136] Thus, by setting the hot water inflow and outflow positions according to the temperature stratification of the hot water tank 83 , it is possible to suppress the energy required to generate heat while achieving efficient supply of hot water in an appropriate temperature range.

[0137] In addition, the heat source low-temperature water circuit 86 of this embodiment has: a cold water side heat source outbound pipeline 121, which transports cold water from the cold water tank 82 to the heat source device 81; and a cold water side heat source return pipeline 122, which returns cold water from the heat source device 81 to the cold water tank 82; the connection positions of the various pipelines of the cold water tank 82 are set to, from top to bottom, the order of cold water return pipeline 111b, cold water side heat source return pipeline 122, cold water outbound pipeline 111a, and cold water side heat source outbound pipeline 121.

[0138] Thus, by setting the outflow and inflow positions of the cold water according to the temperature stratification of the cold water tank 82, it is possible to suppress the energy required for generating cold and heat while achieving efficient supply of cold water in an appropriate temperature range.

[0139] In the above embodiment, the module 11 is connected to another module 11 via the bypass path 31 provided with the bypass valve 32, but the present invention is not limited to this structure. The bypass path 31 and the bypass valve 32 may be omitted from the structure of the above embodiment.

[0140] The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments and variations. In addition, the effects described in the above embodiments are only preferred effects and are not limited to the effects described in the above embodiments.

[0141] Reference numerals

[0142] 1 Carbon dioxide recovery device

[0143] 11 modules

[0144] 12 Adsorption material

[0145] 62 Vacuum Pump

[0146] 63 Carbon dioxide recovery pump

[0147] 64 intercooler

[0148] 70 heat exchange device

[0149] 80 heat source circuit

[0150] 81 Heat Source

[0151] 82 Cold water tank (cooling heat transfer medium tank)

[0152] 83 Warm water tank (heat transfer medium tank for heating)

[0153] 85 heat source high temperature water circuit

[0154] 86 Heat source low temperature water circuit

[0155] 87 Equipment heat recovery circuit

[0156] 90 Control Device

[0157] 111 Cold water pipeline (cooling heat transfer medium pipeline)

[0158] 111a Cold water outflow pipeline (cooling heat transfer medium outflow pipeline)

[0159] 111b Chilled water return line (cooling heat transfer medium return line)

[0160] 112 Warm water pipeline (heating medium pipeline)

[0161] 112a Warm water outgoing pipeline (heat transfer medium outgoing pipeline for heating)

[0162] 112b Warm water return line (heat transfer medium return line for heating)

Claims

1. A carbon dioxide recovery device comprising: The plurality of modules have adsorbent materials therein and perform an adsorption process and a desorption process. The adsorption process involves drawing gas containing carbon dioxide into the adsorbent material to adsorb the carbon dioxide. The desorption process involves heating the area surrounding the adsorbent material under reduced pressure to desorb the carbon dioxide from the adsorbent material. a heat exchange device capable of supplying a heating heat transfer medium to each of the modules for heating and supplying a cooling heat transfer medium to each of the modules for cooling; and The flow control unit is capable of selectively supplying the heating heat transfer medium or the cooling heat transfer medium to the module; and The aforementioned heat exchange device has: A heat pump type heat source device heats the aforementioned heating heat transfer medium and cools the aforementioned cooling heat transfer medium; The heat source high-temperature water circuit includes a heating medium tank for storing the heating medium heated by the heat source, so that the heating medium circulates between the heating medium tank and the heat source; The heat source low-temperature water circuit includes a cooling heat transfer medium tank storing the cooling heat transfer medium cooled by the heat source device, so that the cooling heat transfer medium circulates between the cooling heat transfer medium tank and the heat source device; and a heating heat transfer medium outgoing pipeline, supplying the heating heat transfer medium from the heating heat transfer medium tank to the modules; A heating heat transfer medium return line returns the heating heat transfer medium heated by the module to the heating heat transfer medium tank; a cooling heat transfer medium outgoing pipeline, supplying the cooling heat transfer medium from the cooling heat transfer medium tank to the modules; and The cooling heat transfer medium return line returns the cooling heat transfer medium after cooling the module to the cooling heat transfer medium tank.

2. The carbon dioxide recovery device according to claim 1, wherein: The flow path control unit is configured to control the flow path of each of the modules. supplying the cooling heat transfer medium to the module performing the adsorption process; The heating heat transfer medium is supplied to the module that performs the separation step.

3. The carbon dioxide recovery device according to claim 2, wherein: The flow path control unit is configured to be able to adjust a flow rate of the cooling heat medium or the heating heat medium supplied to the module.

4. The carbon dioxide recovery device according to claim 3, wherein: The flow path control unit performs control as follows: In the initial stage of the temperature rise of the above-mentioned separation process, the flow rate of the above-mentioned heating heat transfer medium is relatively increased. In the temperature maintaining stage after the initial temperature rising stage, the flow rate of the heating heat transfer medium is relatively reduced.

5. The carbon dioxide recovery device according to any one of claims 1 to 4, wherein: The aforementioned heat source high temperature water circuit has: a heat source outbound pipeline on the heating heat transfer medium side, for conveying the heating heat transfer medium from the heating heat transfer medium box to the heat source device; and The heat source return pipeline on the heating heat transfer medium side returns the heating heat transfer medium from the heat source device to the heating heat transfer medium tank; and The connection positions of the pipelines of the aforementioned heat transfer medium box for heating are set in the order of, from top to bottom, the aforementioned heat transfer medium side heat source return pipeline, the aforementioned heat transfer medium outgoing pipeline, the aforementioned heat transfer medium side heat source outgoing pipeline, and the aforementioned heat transfer medium return pipeline.

6. The carbon dioxide recovery device according to any one of claims 1 to 4, wherein: The aforementioned heat source low temperature water circuit has: A heat source outbound pipeline on the cooling heat transfer medium side, which transports the cooling heat transfer medium from the cooling heat transfer medium box to the heat source device; and The heat source return line on the cooling heat transfer medium side returns the cooling heat transfer medium from the heat source device to the cooling heat transfer medium tank; and The connection positions of the pipelines of the aforementioned cooling heat transfer medium box are set in the order of, from top to bottom, the aforementioned cooling heat transfer medium return pipeline, the aforementioned cooling heat transfer medium side heat source return pipeline, the aforementioned cooling heat transfer medium outgoing pipeline, and the aforementioned cooling heat transfer medium side heat source outgoing pipeline.

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